Pump



P. L.. scoTT Feb. s, 1935.`

PUMP

'Filed OC'K.. 20, 1930 Patented Feb. 5, 1935 s PArENT ori-VICE Super Diesel Tractor-Corporation., La Porte,

` n E Ind., a corporation f New York l fApplication October 2Q, 1930, Serial No. 489,743

` 24 claims. (c1. 1oz-15o)` Thisl invention relates to a pump andparticularly to a pump adapted'to deliver avsmall quantity of fluid under great pressure and'with great speed.`

5 It has for one object toprovide a A"pump in vwhich the mechanicalshock dueto the movement ofv the" pump and its driving mechanism is reduced to elf-minimum.vv Another object is to provide a pump in'whic'h sliding surfaces Within thev pressure chamber are eliminated. Another object is to provide a purnpvin which the walls or a part of the walls of the pump chamber are elastic.- i ,f l y Other objects'fwill appear from time to time in the specification and claims.l

My invention is illustrated more or less diagrammatically in *the accompanying drawing, wherein the gure is a longitudinal section through one vform of my pump:

Av is a pump housing or barrel, having formed within `it a pump bore or chamber A1. At one end it has an enlargement A2 with an enlarged threaded 'adjacent one Iend as at A4. At its oppo-` site end the housing A has an renlargement A5, withinthe upper side of which is formed a relatively shallow depression or cavity A5. 1A second cavity A'1 is formed in thel enlargement A5 and is adapted to receive an outlet valve housing. A8 is a passage communicatingv with thel cavity A" and the rdepression A6. An air vent A9 may be formed in the portion A5 and'willv communicate vwith the depression or chamber A5 and with the exterior of the pump housing. The air vent is normally closed and controlled by a valve A10 which is provided with a suitable handle and means for moving itin or out to open or close the air vent. 'f

vB is an-end closure plate partially cut away as j at B1'to leave what is ineiectlargelyan annulus.

vExtending in from the marginof the member B is a'lever supporting nose or fulcrum B2. The member B maybe fastened to the portion A5 ofthey pump housing by 'meansof screws B5 or by any other'suitablemeans.

Positioned withinthe housing and extending through the bore A1 andbeyondit at each end,

adjacent its end it is provided with a. laterally extending flange C2 which may lie within an annular enlargement C3 formed in the depression A5. Positioned about the end of the rod C adjacent one end and bearing against the flange C2 is a 5 disc C4. This disc as shown is made up of a plurality of laminations, although for some purposes it might be made of a single member. The edges 'of the disc are gripped and held in sealing contact by the" annular part B1 of the member B. 10 Positioned on the rod C and bearing against the disc C4 is a rigid disc C5. This disc is generally at but the side-which contacts the disc C4 is tapered away from it adjacent its edges as at C5. Threaded on the outer or exposed end of the l5 rod C and holding'the laminated disc C4 and the rigidl disc C5 in position upon the rod is a hook nut Crl which may include a hook or ring C8 and which has a portion C9 carrying a down-v wardly or inwardly facing point C1.`

D is a lever provided with a nose D1 adapted to engagethe hook point C1u and provided with a depression or notch D2 adapted to' be seated and to move upon the fulcrum B2. The lever D carries at its free end a roller D3 which is in contact with a cam-D4. The cam D4 carries a raised portion or nose D5 and is itself supported upon a shaft D6 and rotates in response to rotation of the shaft.

Removably positioned within the cavity A3 is an inlet valve housing E. This housing-is provided with a bore or chamber E1 which is enlarged at its inner end as at E2 and preferably formed Vwith an inclined seat portion E5. E4 is a valve positioned within the bore E1 and having a head portion E5 adapted to be seated upon the seat E3.' A spring 4E6 tends normally to hold the valve E4, E5 seated, that is, closed.

Seated within the cavity or chamber A'I is an outlet or discharge valve housing F provided with a bore F1 which at its inner end is reduced and carries a seating4 portion F2 which communicates with a bore F3 of reduced diameter, which 'is be taken as in a sense diagrammatic. Particularly, the details of construction-o! the laminated disc and the means oi.' securing its'edge might be almost infinitely varied. It will be understood that the pump rod C is the spring element and it is somewhat stretched 4during the cycle of pump operation in a manner which will be described below. While it has been shown as being stretched by a lever which is operated by achamber within the housing is thus formed by the cavity A in one face of the portion A5 and by.

the clearance about the pump rod C and its associated parts within the pump housing. 'Ihe pump may be mounted in any association where -it is t0 be used.` With theparts in the position' shown, a suction stroke is to commence.' The Acam'is set in motion and operates against the roller Da in the free end ot the lever D. When the nose or raised portion D5 of the cam contacts the lever it moves the latter to the right, -as indicated in the figure. 'Ihe lever-bearing upon the fulcrum and the hook nut which is iixed to the end of the rod C, exerts an vextending or stretching eiIect upon the rod, stretching it a very minute amount. Thelaminated diaphragm or disc (l4 which is ixed to the rod moves with it and thus moves outward with respectto the housing portion A5, increases the volume oi.' the space within the pump housing and so creates suction, unseats the inlet valve and draws in a charge of uid.

As the cam' continues tomove tnehighlpoint beyond or slips beneath the roller D and the lever D is no longer heldout. As soon as the lever is free to move in the reversedirection, that is to say, to the left, as indicated in the figure,

the rod C contracts suddenly, drawing the diaphragm in towards Vits former position, thereby reducing the `volume within the pump'housing,

'. creating' pressure, seating the inlet valve and forcing the'- outlet valve open and electing or'discharging a quantity oi' fluid-from that valve.

The diaphragm or disc' C4, whether it be made of a single member or a plurality of laminations,

may b'e for some purposes extremely still', so

stm as to be' in met appronmately-rigia 'In that case it would oier resistancev to the outward movement caused by the movement of the lever D and the movement of this lever would then be resisted not alone by the resistance of the rod C to stretching but by the resistance of the member C4 to bending or deformation. The elasticity'of the disc Ct would in that case assist materially in returning the parts to their original position, as soon as the movement oi' the cam permits the lever D to vi'ree the parts for return movement.

1. In a pump, 8. housing defining a pump chamber, a diaphragm, rigidly fixed to said housing, a member secured to said diaphragm and bearing against al portion oi' said housing and tending to preve'nt outward movement of the diaphragmyand positive mechanical means for causing .said member toyieid a minute amount and for simultaneousLv causing said diaphragm to move outwardly to increase the volume of the pump chamber, andinlet and outlet means in communication with said pump chamber.

2. In a pump, a housing defining a pump chamber, a diaphragm, rigidly ilxved to said housing, a member secured to said diaphragm and bearing against a portion of said housing and tending to prevent 'outward movement of the diaphragm. and positive mechanical means for causing said member to yield and for simultaneously causing said diaphragm to move minutely outwardly to'increase the volume oi' the pump chamber. and inlet 'and outlet means in communication with said pump chamber.

3.In a pump,va housing deilnlng a pump.

chamber, a diaphragm rigidly xed to said housing, a. member secured to said diaphragm and bearing against 'a portion of said housing andl ,tending to prevent outward movement ot the diaphragm, and positive mechanical means for causingsaid memberv toyield a minute amount and for `simultaneously lcausing said diaphragm to move outwardly to increase' the volume of -thev lpump chamber, said member capable of itself alone of returning to its initial position when iree'to do so, and inlet and outlet means in communication with said pump chamber. 4. In a pump, a' housing defining a pum chamber, a diaphragm rigidly iixed vto said housing.' a member secured to said diaphragm and .bearing against aportion of said housing and tending to prevent outward movement of the diaphragm,` and positive mechanical means for causing said member to yield a minute amount and for simultaneously causing said diaphragm to move outwardly to increase the volume ofthe pump chamber, said diaphragm capable of itself alone of returning to its initial positionwhen free to do so, and inlet and outlet means in com- --munication with said pump chamber.

5. In a pump, a housing deiining avpump chamber, a diaphragm, rigidly xed to said housing, a member secured to said diaphragm and bearing against a portion ofsaid'housing andA tending to prevent outward movement ofthe diaphragm, and positive mechanical means ilor` causing said member to yield a minute amount andltor simultaneously causing said diaphragm tomove outwardly to increase the volume of the pump chamber, said member and said diaphragm capable o! themselves alone of returning to their initial position when free todo so, and inlet and outlet means chamber. l

6. In a pump, a housing deiining a pump chamber..a diaphragm.-rigidly xed to said housing, a member secured to said diaphragm andl bearing against a portion of said housing and tending to prevent outward movement oi' the diaphragm, and positive mechanical means for causing said member to yield in stretching and `for simultaneously causing said diaphragm to yield outwardly to increase the volume of the pump chamber, and inlet and outlet means in communication with said pump chamber.

7. In a pump, a housing denning a pump cham ber, a diaphragm, rigidly fixed to said housing.

in communication with said pump a member secured to said diaphragm and bearing against a portion of' said lousing and tending to prevent outward movement of the diaphragm, and positive mechanical 'means for causihg said member to yield minut'ely in stretching and for simultaneously causing said diaphragm to yield outwardly to increase the volber, a diaphragm, rigidly fixed to said housing,

a member secured to said diaphragm and bearing against a portion of said housing and tending to prevent outward movement of the diaphragm, and positive mechanical means for causing said memberto yield minutely in stretching and for simultaneously causing said diaphragm to move outwardly to increase the volume of the pump chamber, said .member capable of itself alone of returning to its initial position when free to do so, and inlet and outlet means lin communication with said pump chamber.

9. In a pump, a housing dening a pump chamber, a diaphragm, rigidly xed to said housing, a member secured to said diaphragm and bearing against a portion of said housing and tending to prevent outward movement of the diaphragm, and positive mechanical means for causing said member lto yield minutely in stretching and -for simultaneously causing said diaphragm4 to yield outwardly to increase the volume of the pump chamber, said membercapable of itself alone of returning to its initialposition when free to do so, and inlet and outlet means in communication with said pump chamber.

10. Ina pump, a housing defining apump chamber, a diaphragm, rigidly fixed to said housing, a member secured to said diaphragm and bearing against a portion of said housing and tending to prevent outward movement of the diaphragm, and positive mechanical means for causing said'member to yield minutely in' stretching and for simultaneously causing said diaphragmy to yield minutely outwardly to increase the volume of the pump chamber, said member and said diaphragm capable of themselves alone of returning to their initial position when free to do so, and inlet and outlet means in communication with said pump chamber.

11. In a pump, a .housing deiining a pump chamber, an approximately rigid diaphragm,

rigidly fixed to said housing, a member secured to said diaphragm and bearing against a portion of said housing and tending to prevent outward movement of the diaphragm, and positive mechanical means for causing said member to yield and for simultaneously causing said diaphragm to yield outwardly to increase the volume of the pump chamber, and inlet and outlet means in Y communication with said pump chamber.

12. In a pump, a housing dening apump chamber, an approximately rigid diaphragm, rig` idly xed to said housing, an approximately rigid member secured to said diaphragm and bearing against a portion of said housing and tending to` rigidly fixed to said housing, an approximately` rigid member secured to said diaphragm and bearing against a portion of said housing and I tending to prevent outward movement of the Idiaphragm, and positive mechanical means for ,causing said member to yield and for simultaneously causing said diaphragm to yield out- `wardly minutely to increase the volume of'the pump chamber,- said member capable of itself alone of returning to its initial position when free to do so, and inlet and outlet means in lcommunication with said pump chamber.

1'4. In a pump, a housingvdening Aa pump chamber, an approximately, rigid diaphragm, rigidly fixed to said housing, an approximately rigid member secured to said diaphragm and bearing against a portion of said housing and tending to prevent outward movement of the diaphragm, and positive mechanical means for causing said member to yield and for simultaneously causing said diaphragm to yield minutely outwardly to increase the volume of the, pump chamber, said diaphragm capable of itself alone of returning to its itial position when free to do so, and inlet and 'outlet means in communication with said` pump chamber.

l5'. In a pump, a housing defining a pump chamber, an approximately rigid diaphragm, rigidly fixed to said housing, an approximately rigid member secured to said diaphragm and bearing against a portion of said housing and tending to prevent outward movement of the diaphragm, and positive mechanical means for chamber, said member and said diaphragm capable of themselves alone 'of returning to their initial position when free to do so, and inlet and outlet means in communication with said pump chamber. y

16. In a pump, a housing dening a pump chamber, a laminated diaphragm, rigidly fixed to said housing, a member secured to said diaphragm and bearing against a portion of said housing and tending to prevent outward movement of the' diaphragm, and positive mechanical means for causing said member to yield and for simultaneously causing said diaphragm to yield outwardly to increase the volume of the pump chamber, and inlet and outlet means in communication with said pump chamber.

, 17. In a pump, a housing defining apump chamber,l an approximately rigid laminated diaphragm, rigidly xed to said housing, an approximately rigid member secured to said diaphragm and bearing against a portion of said housing and tending to prevent outward movement of the diaphragm, and positive mechanical means wardly to increase the volume of the pump chamber, and inlet and outlet means in communication with said pump chamber.

lov

18. In a pump, a housing defining a pump A chamber, an approximately rigid laminated'diaphragm, rigidly fixed to said housing, an approximately rigid member securad Ato saiddiaphragm and bearing against a portion of said housing and tendingto prevent outward movement of the diaphragm, and positive mechanical means -for causing said member to yield minutely in stretching land for simultaneously causing said diaphragm to yield minutely outwardly .to increase the volume of the pump chamber, and inlet andv outlet `means in communication with said pump chamber. v

L19. In a pump a housingv defining'a. pump chamber, an approximately rigid laminated dia-'- phragm, rigidly fixed to said housing and forming a part of the pump chamber wall, an ap` proximately rigid member secured to said diaphragm and bearing against a portion of said housing and tending to prevent outward movement of the diaphragm; and positive mechanical means for causing said member to yield minutely in Stretching and for simultaneously causing said diaphragm to yield minutely outwardly :to increase the volume of the pump chamber,

said member and said diaphragm capable of themselves alone of returning to their .initial position when free to do so, and inlet and'outlet means in communication with said pump chamber.

20. In a pump, a rigid housing defining in part a pump chamber, an approximately rigid lami- -nated diaphragm rigidly xed to said housing v and forming a part of the pump chamber wall,

and approximately rigid member secured to said diaphragm and bearing against a portion of said housing yand tending to prevent outward movement of the diaphragm, and positive mechanical means for 'causing said member to yield minutely in stretchingr and for simultaneously causing saidl diaphragm to yield-minutely, outwardly to increase the volume of the pump chamber, said member and said daphragmcapable of themselves alone of retugrning to their initial position when free to do so, and inlet and outlet meansi inA communication with said pump chamber.

21. In a pump, a housing defining a pump chamber, a laminated diaphragm, rigidly iixed to said housing, a member secured to said diaphragm and bearing against a portion of said housing and tending to preventoutward movement of the diaphragm, and positive mechanical means for causing'said member to yield'a minute amount and for simultaneously causing said diaphragm to movev outwardly to increase the vol- "ume of the pump chamber, and inlet and outlet means in communication with said pump chamber.

22. In a pump, a housing dening a pump chamber, a laminated diaphragm, rigidly iixed to said housing, a member secured to said diaphragm and bearing against a portion of said housing and tending to prevent outward movement of the diaphragm, and positive mechanl cal means for causing said member to yield and for simultaneously causing said diaphragm to move minutely outwardly to increase the volume of the pump chamber, and inlet and outlet means in communication with said pump chamber.

23. In a pump, a housing dei'lninga pump chamber, an approximatelyrigid laminated diaphragm, rigidly xed to said housing, a lmember secured to said diaphragm and bearing against a portion of said housing and tending to prevent outward movement of the diaphragm; and positive mechanical means for causing said member to yield and for simultaneously causing said diaphragm to yield outwardly to increase the volume of the pump chamber, and inlet and outlet means in communication with said pump chamber.

24. Ina pump, a housing dening a purripy the pump chamber, and inlet and outlet means in communication with said pump chamber.

PHILIP LANE SCO'I'I. 

